Add firewall allow functionality RHEL

Centos7-Dockerfile

@@ -1,2 +1,3 @@
 FROM docker.io/pycontribs/centos:7
-RUN yum install -y iproute
+RUN yum install -y iproute firewalld python-firewall net-tools && \
+    systemctl enable firewalld

Centos8-Dockerfile

@@ -0,0 +1,6 @@
+# Centos8-Dockerfile
+FROM docker.io/pycontribs/centos:8
+RUN yum install -y iproute firewalld net-tools && \
+    systemctl disable nftables && \
+    systemctl enable firewalld && \
+    

handlers/main.yml

@@ -9,3 +9,14 @@
 - name: cmk fresh install
   set_fact:
     cmk_fresh_install: True
+
+- name: ensure firewall open
+  firewalld:
+    port: 6556/tcp
+    state: enabled
+    permanent: yes
+    immediate: yes
+
+- name: ensure firewall reloaded
+  command: firewall-cmd --reload
+  changed_when: false

tasks/RedHat.yml

@@ -24,6 +24,8 @@
       notify:
         - restart xinetd
         - cmk fresh install
+        - ensure firewall open
+        - ensure firewall reloaded
 
     - name: Remove agent Download
       file: